通过在La-Fe-Si薄带中掺杂碳研究其微观结构和磁热效应

Microstructure and Magnetocaloric Effect by Doping C in La-Fe-Si Ribbons.

作者信息

Song Huihui, Hu Yuhu, Zhang Jiale, Fang Jinyu, Hou Xueling

机构信息

School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China.

出版信息

Materials (Basel). 2022 Jan 4;15(1):343. doi: 10.3390/ma15010343.

DOI:10.3390/ma15010343

PMID:35009489

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8746206/

Abstract

The melt-spun ribbons of LaFeSiC (x = 0, 0.1, 0.2, 0.3) compounds are prepared by the melt fast-quenching method. The doping of C is beneficial to the nucleation and precipitation of the La (Fe, Si) phase, which is indicated by the microstructure observation and the elemental analysis. Subsequently, the ribbons of LaFeSiC are annealed at different times, and the phase composition, the microstructures, and the magnetic properties are investigated. The LaFeSiC ribbons annealed at 1273 K for 2 h achieved the best magnetic properties, and the maximum isothermal magnetic entropy change with a value of 9.45 J/(kg·K) upon an applied field of 1.5 T at an increased Curie temperature 255 K.

摘要

采用熔体快淬法制备了LaFeSiC（x = 0, 0.1, 0.2, 0.3）化合物的熔纺带材。通过微观结构观察和元素分析表明，C的掺杂有利于La(Fe, Si)相的形核和析出。随后，对LaFeSiC带材进行不同时间的退火处理，并研究其相组成、微观结构和磁性能。在1273 K下退火2 h的LaFeSiC带材具有最佳磁性能，在1.5 T外磁场下，居里温度升高到255 K时，最大等温磁熵变为9.45 J/(kg·K)。